package scct.zhang.dao;

import scct.zhang.model.User;
import scct.zhang.utils.DBUtils;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

public class UserDao {
    public User login(String name, String pass) {
        User user = null;
//        获取数据库连接对象
        Connection conn = DBUtils.getConnection();
        String sql = "select * from sm_user where username=? and password=?";
//        预编译查询对象
        try {
            PreparedStatement pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, name);
            pstmt.setString(2, pass);
//            查询
            ResultSet rs = pstmt.executeQuery();
            if (rs.next()) {
                int id = rs.getInt("id");
                String username = rs.getString("username");
                String password = rs.getString("password");
                int age = rs.getInt("age");
                String gender = rs.getString("gender");
                String mobile = rs.getString("mobile");
                user = new User(id, username, password, gender, age, mobile);
            }
            DBUtils.closeConnection(conn);
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
        return user;
    }

    public boolean updateUser(int id,String password,String gender,int age,String mobile){
        int count = 0;
        Connection conn = DBUtils.getConnection();
        String update_sql = "update sm_user set mobile=?,age=?,gender=?,password=? where id = ?";
        try {
            PreparedStatement pstmt = conn.prepareStatement(update_sql);
            pstmt.setString(1,mobile);
            pstmt.setInt(2,age);
            pstmt.setString(3,gender);
            pstmt.setString(4,password);
            pstmt.setInt(5,id);
            count = pstmt.executeUpdate();
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
            return count > 0;
    }
    
    
//    判断是否存在
    public boolean isDupname(String name){
        int count = 0;// 查到的用户数量
        Connection conn = DBUtils.getConnection();
        String sql = "select*from sm_user where username=?";
        try {
            PreparedStatement pstmt = conn.prepareStatement(sql);
            pstmt.setString(1,name);
            ResultSet rs = pstmt.executeQuery();
            if (rs.next()){
                count =1;
            }
//            DBUtils.closeConnection(conn);
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
        return count>0;

    }

    public List<User> getAllUser(){
        Connection conn = DBUtils.getConnection();
        List<User> users = new ArrayList<>();

        String sql = "select * from sm_user";
        try {
            PreparedStatement pstme = conn.prepareStatement(sql);
            ResultSet rs = pstme.executeQuery();
            while (rs.next()){
                int id = rs.getInt("id");
                String username = rs.getString("username");
                String password = rs.getString("password");
                int age = rs.getInt("age");
                String gender = rs.getString("gender");
                String mobile = rs.getString("mobile");
                users.add(new User(id,username,password,gender,age,mobile));
            }
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
    return users;
    }

//    添加用户的方法
    public boolean addUser(String username,String password,String gender,int age,String mobile){
        int result = 0;
        Connection conn = DBUtils.getConnection();
        String insert_sql = "insert into sm_user values(null,?,?,?,?,?)";
        try{
            PreparedStatement pstmt = conn.prepareStatement(insert_sql);
            pstmt.setString(1,username);
            pstmt.setString(2,password);
            pstmt.setString(3,gender);
            pstmt.setInt(4,age);
            pstmt.setString(5,mobile);
            result = pstmt.executeUpdate();
        }catch (SQLException e){
            throw new RuntimeException(e);
        }
        return result == 1;
    }

    public User getUserById(int id){
        User user = null;
        Connection conn = DBUtils.getConnection();
        String sql = "select*from sm_user where id=?";
        try {
            PreparedStatement pstmt = conn.prepareStatement(sql);
            pstmt.setInt(1,id);

            ResultSet rs = pstmt.executeQuery();
            if (rs.next()){
                String username = rs.getString("username");
                String password = rs.getString("password");
                String mobile = rs.getString("mobile");
                String gender = rs.getString("gender");
                int age = rs.getInt("age");
                user = new User(id,username,password,gender,age,mobile);

            }
            DBUtils.closeConnection(conn);

        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
        return user;
    }

}
